feat: Publish NPM package for version v5.6.0 rc1

[zguesmi]

Successful publish :

• Job: PoCo/actions/runs/16624101576 ✔️
• Tags on NPM: https://www.npmjs.com/package/@iexec/poco?activeTab=versions

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 83.66%. Comparing base (49b5a66) to head (60adfc2).
⚠️ Report is 19 commits behind head on develop.

Additional details and impacted files

@@           Coverage Diff            @@
##           develop     #247   +/-   ##
========================================
  Coverage    83.66%   83.66%           
========================================
  Files           38       38           
  Lines         1218     1218           
  Branches       227      227           
========================================
  Hits          1019     1019           
  Misses         199      199           

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[Copilot]

Pull Request Overview

This PR updates the package version to 5.6.0-rc1 and configures the project for NPM publication. The changes include version bumping, repository URL corrections, and GitHub Actions workflow updates to enable automated publishing on tag pushes.

• Version bumped from 5.5.0 to 5.6.0-rc1
• Repository URLs corrected from "PoCo-dev" to "PoCo"
• Publish workflow updated to trigger on tag pushes instead of releases

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated no comments.

File	Description
package.json	Version bump and repository URL corrections
.github/workflows/publish.yml	Updated trigger and workflow dependencies for NPM publishing
.github/workflows/main.yml	Renamed job from "coverage" to "build-and-test"

Comments suppressed due to low confidence (1)

.github/workflows/publish.yml:14

• The workflow reference '@publish-npm-v1.5.0' may not exist. Based on the previous version being v1.2.0, please verify that v1.5.0 is a valid published version of this workflow.

    uses: iExecBlockchainComputing/github-actions-workflows/.github/workflows/publish-npm.yml@publish-npm-v1.5.0